Electric heater.



P. KUHN.

ELECTRIC HEATER.

APPLICATION FILED un. 5, 1912.

1,087,592, v PatentedFeb. 17, 1914,

boiliing' point.

UNITED sTATEsgr/rnnir OFFICE.

FRANK KUHN, OF DETROIT, MICHIGAN.

ELECTRIC HEATER.

To all whom it may concern Be it known that I, FRANK KUHN, a citizen ofthe United States of America, residing at Detroit,'in the county oflVayne and State of Michigan, have invented certain new and usefulImprovements in Electric Heaters, et which the following is aspecilication, reference being had therein to the accompanying drawings.

rl`he invention relates to electric heaters designed :tor attachment tocooking utensils and more particularly for the heatingof coilee lurnsand for similar uses, and the invention consists in the construction ashereinafter set forth.

ln the drawings, Figure l is a vertical central section through theheater as applied. to a collec urn ofthe percolator type; Fig. 2 is aperspective view of the heating unit de.- tachcd. Fig. 3 is aperspective view of the thumb-screw.

A is an urn or vessel containing the material to be heated and issupgorted on suitable standards such as B.

C is a heat receiving andY distributing body which is secured to thebottom of the urn or vessel and is suspended therefrom. lVith theconstruction shown which is designed lor a percolator, the member C isprovided with an upwardly extending' nipple l) which passes into theinterior of the vessel and has loi-med therein the well or chamber lllin which the tluid is brought to the 'lfne lower face of the body C isextended to provide a rclativelylarge area for receiving heat from theheating unit, and as shown, this tace is of larger diameter than thebottom ot the urn and lends into proximity to the standards B withoutbeii'ig in heat conducting contact therewith. The body oi the mel'nber Calso preferably tapers from a thin marginal portion to a greaterthickness at the center so as to provide a constantly increasing crosssection tor the molecular conduction of heat from the lower surface tothe walls ot' the well E.

The electrical heater F is arranged to be clamped in contact with themember C and consists of an armored disk unit (it, a backing plate llbeneath the same, and a, easing I ilor inclosing said disk and plate andsupported therefrom to `form an air space. The

Specication of Letters Patent.

Application filed April 5, 1912.

Patented F eb. 17, 1914.

Serial No. 688,601.

disk G and plate H are et slightly lesser diameter than the member C asis also the casing l, so that said member C forms a cover for the casepreventing the accidental spilling of fluid therein. The casing I issuspended by a spacer J which is connected by a screw K to the unit Gand plate H, and by a screw L to the bottom oit the casing. For clampingthe unit in irm heat conducting contact with the lower face of: themember C, shoulder screws M are provided having shanks N beyond theshoulder of a length greater than the height oli the casing/I and whichpass through apertures C in the bottom thereof. These screws arepreferably provided with linger grips l for tightening or loosening thesame.

lznuse, the heater may be attached to various utensils each ot which isprovided with a member C and the exchange from one to another is easilyetlected. The current is supplied to the unit through terminals Qpassing radially outward through the casing I and insulated therefrom bybushings li.

What I claim as my invention is:

l. The combination with a heat distributing body having a llat face, otan electrical heater for attachment thereto, conun'ising an armoredheating unit, a backing plate therefor@ casing surrounding said unit andhacking plate and spaced therefrom to 'torni an air heat insulatingchamber, suspensory means for securing said casing to said unit andbacking plate, and clamping means passing through an aperture in saidcasing and securing said backing plate and armored resistance to saidheat distributing body.

2. The combination with a utensil, of a heat absorbing and distributingbody cured to said utensil and l'iaving a llat lace, a fiat armoredheating unit attached lo the lint Ytace of said distributing body. acasing inclosiug the heating unit and .spar-cd therelrom '.iorming aheatinsulating chamber, said casing' providedwvilh an annular upturnedflange in marginal contact with the distributilig body, means ii'orclamping said heating unit to said distributing brdy, and means forattaching said casi ng to sa id heating unit. A

3. rl`he combination with an electrical heater, comprising an arn'ioredhiating unit, of a heat absorbing andf'dislrilmting body Utl other dumsaid unit', having a plain face, n l backlog pinto, a hollow cup-shaped@smug l mclosmg' smd heaiimg unit and spaced they@ i m presence of two'Wnose Y FRANK. KUHN( 1mm, 'olmmg' u hoot msllllnilng ohambol, :md moonsfor detnolmbly dumping Said heating' unit and backing plate to the heatabsorbing imddStribl'xtng body.

Witnesses 2 W. J. BELKNAP, JAMES F. BARRY.

n iostimony w.l'ioro f lia'fx my signature

